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Service and Troubleshooting
Pride and workmanship go into every product to provide
our customers with quality products. It is possible, however,
that during its lifetime a product may require service.
Products should be serviced only by a qualified service
technician who is familiar with the safety procedures
required in the repair and who is equipped with the proper
tools, parts, testing instruments and the appropriate service
manual. REVIEW ALL SERVICE INFORMATION IN THE
APPROPRIATE SERVICE MANUAL BEFORE
BEGINNING REPAIRS.
Only personnel that have been trained to install, adjust,
service or repair(hereinafter, "service") the equipment
specified in this manual should service the equipment. The
manufacturer will not be responsible for any injury or
property damage arising from improper service or service
procedures. If you service this unit, you assume responsi-
bility for any injury or property damage which may re-
sult. In addition, in jurisdictions that require one or more
licenses to service the equipment specified in this manual,
only licensed personnel should service the equipment.
Improper installation, adjustment, servicing or repair of
the equipment specified in this manual, or attempting to
install, adjust, service or repair the equipment specified in
this manual without proper training may result in product
damage, property damage, personal injury or death.
PROP 65 WARNING
FOR CALIFORNIA CONSUMERS
Cancer and Reproductive Harm -
www.P65Warnings.ca.gov
ACVC8*CA/AMVC8*CA & ACVC80*AA/AMVC80*AA
GCVC8*CA/GMVC8*CA & GCVC80*AA/GMVC80*AA
WARNING
WARNING
Copyright © 2019-2020 Goodman Manufacturing Company, L.P.
Gas Furnaces
IMPORTANT INFORMATION ............................................. 2
PRODUCT IDENTIFICATION ............................................ 4
SYSTEM OPERATION ....................................................... 6
SCHEDULED MAINTENANCE ........................................ 24
SERVICING ...................................................................... 27
CHECKING VOLTAGE ............................................... 28
CHECKING WIRING ................................................... 28
CHECKING THERMOSTAT, WIRING ........................ 28
HEATING ANTICIPATOR ............................................ 29
CIRCUIT ....................................................................... 29
CHECKING DUCT STATIC ......................................... 33
CHECKING TEMPERATURE RISE ........................... 33
CHECKING PRIMARY LIMIT CONTROL .................. 34
CHECKING AUXILIARY LIMIT CONTROL ................ 34
CHECKING FLAME ROLLOUT CONTROL .............. 35
INDUCED DRAFT BLOWER MOTOR ....................... 36
CHECKING GAS VALVE (REDUNDANT) ................. 36
CHECKING MAIN BURNERS .................................... 36
CHECKING ORIFICES ............................................... 37
CHECKING GAS PRESSURE ................................... 37
CHECKING HOT SURFACE IGNITOR ...................... 38
CHECKING FOR FLASHBACK .................................. 39
CHECKING PRESSURE SWITCH............................. 39
HIGH ALTITUDE APPLICATION ................................ 39
CHECKING FOR DELAYED IGNITION ..................... 39
CONTROL BOARDS ................................................... 40
MEMORY CHIPS ......................................................... 41
CHECKING FLAME SENSOR .................................... 41
TROUBLESHOOTING CHART ........................................ 42
0140M00517-A
WIRING DIAGRAMS ........................................................ 52
TABLE OF CONTENTS
RS6621004r3
October 2020
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Table of Contents
Related Manuals for Goodman ACVC8 CA Series AMVC8 CA Series
Summary of Contents for Goodman ACVC8 CA Series AMVC8 CA Series
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Page 1: Table Of Contents
CHECKING INTEGRATED IGNITION WARNING CONTROL BOARDS ........... 40 MEMORY CHIPS ............41 Cancer and Reproductive Harm - CHECKING FLAME SENSOR ........41 www.P65Warnings.ca.gov TROUBLESHOOTING CHART ........42 0140M00517-A WIRING DIAGRAMS ............52 RS6621004r3 October 2020 Copyright © 2019-2020 Goodman Manufacturing Company, L.P. -
Page 2: Important Information
IMPORTANT INFORMATION IMPORTANT NOTICES FOR CONSUMERS AND SERVICERS RECOGNIZE SAFETY SYMBOLS, WORDS AND LABELS Pride and workmanship go into every product to provide our customers with quality products. It is possible, however, that during its lifetime a product may require service. Products should be serviced only by a qualified service technician who CARBON MONOXIDE POISONING HAZARD is familiar with the safety procedures required in the repair... - Page 3 IMPORTANT INFORMATION WARNING WARNING Should overheating occur or the gas supply fail If the information in these instructions is not to shut off, turn off the manual gas shutoff followed exactly, a fire or explosion may result valve external to the furnace before turning causing property damage, personal injury or off the electrical supply.
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Page 4: Product Identification
Please use these numbers when requesting service or parts information. Furnace Nomenclature (14 Digits) Brand Minor Revision A- Amana A - Initial Release G - Goodman B - 1st Revision Configuration M - Upflow/Horizontal Major Revision C - Downflow/Horizontal A - Initial Release... - Page 5 AMVC800805DX AA AMVC801005CX AA GMVC800603BN AA GMVC800604BN AA Goodman® Brand 80% Bluetooth Capable Gas Furnace, 2 stage gas valve. Provides 2 GMVC800803BN AA stages of heating & cooling with single stage thermostat. Up flow/Horizontal Left and GMVC800804CN AA GMVC80*N Right, Induced Draft, Nidec multi-speed ECM motor.
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Page 6: System Operation
SYSTEM OPERATION ELECTRICAL CONNECTIONS Connect hot, neutral, and ground wires as shown in the wiring diagram located on the unit’s blower door. For direct vent applications, the cabinet opening to the junction box must be sealed air tight using either an UL approved WARNING bushing such as Heyco Liquid Tight or by applying non- reactive UL approved sealant to bushing. - Page 7 SYSTEM OPERATION NOTE: Do not use gas piping as an electrical 6. System Testing: Download the CoolCloudHVAC phone ground. To confirm proper unit grounding, application (see pages 31 and 32)and use it to test all turn off the electrical power and perform the operations of both indoor and outdoor units.
- Page 8 SYSTEM OPERATION Dual Fuel Adjustment 4. Under Target Threshold (7 segment menu Utt): If the This system will automatically determine if the heat pump is furnace is able to satisfy the thermostat using Low Stage capable of satisfying the thermostat in the selected System Gas Heat Only for the selected number of consecutive Target Runtime.
- Page 9 SYSTEM OPERATION Circulator Blower Speed Tonnage Tonnage Tonnage Tonnage Airflow Airflow Airflow Airflow The Airflow quantity is displayed as a number on the three Selection Selection Selection Selection 1440 1960 7 segment displays, rounded to the nearest 100 CFM. The 1480 2000 display alternates airflow amount and the system operating...
- Page 10 SYSTEM OPERATION Low Voltage Wiring - General Information INDOOR BOARD TERMINAL The Furnace functions with any thermostat that can be CONNECTIONS configured to provide 24VAC on Y for cooling calls and 24VAC on W for Heating calls. Based on these simple inputs, internal algorithms will decide how to control two stages of furnace heat in addition to any single or multi stage outdoor heating / cooling operation (the algorithms...
- Page 11 SYSTEM OPERATION OUTDOOR INDOOR BOARD TERMINAL BOARD TERMINAL INDOOR CONNECTIONS CONNECTIONS BOARD TERMINAL CONNECTIONS 24 VAC Thermostat 24 VAC Thermostat Remote Condensing Unit (Single-Stage Cooling) Optional Optional Optional Optional Optional if feature Optional if supported by feature thermostat supported by thermostat Communicating Inverter Non-communicating Single Stage A/C...
- Page 12 SYSTEM OPERATION Dehumidification Control Options Key Mitigations: Full featured TS (dehum & overcool) Connect G and dehum wire correctly Dehumidistat Dehumidification Control Options Dry Environment Install any 24VAC Thermostat has a Dehum or thermostat on the Configurable terminal with market - Use Y, W, G Dehum option signals Install Dehumidistat in...
- Page 13 SYSTEM OPERATION Optional 24 VAC Humidifier Connection 115 Volt Line Connection of Electronic Air Cleaner Locate the factory supplied 4” Brown wire connected to the low fire pressure switch. Strip insulation from the end of the wire & connect field installed low voltage control wiring. WARNING Refer to diagram below for low voltage connection of field supplied 24 VAC humidifier.
- Page 14 SYSTEM OPERATION Cool Cloud HVAC Phone Application – General Users can see specific model information, review active Information diagnostic error codes, observe system status during operation, make system menu adjustments such as the Examples of Cool Cloud HVAC Phone Application target runtime, add site visit notes and run system testing Screens of all operational modes (heat / cool / fan) directly from...
- Page 15 SYSTEM OPERATION If the phone remains within Bluetooth range during the To select an option; press and release the center button to three steps, the user will be notified when each step has stop the current option from flashing. When the option has been completed and informed about what to do next.
- Page 16 SYSTEM OPERATION Airflow Display 3. The screen will now display Menu L6F (Last 6 Faults). When the blower is running the CFM will be displayed in Continue pressing and releasing the Right Button Status Menu. The first 7 segment character will display “A”. until you see FSd which is the menu for Constant Fan The second &...
- Page 17 SYSTEM OPERATION In some areas the gas supplier may artificially derate the Gas Heat Trim Factor Option Menu gas in an effort to compensate for the effects of altitude. If Gas Heat airflow may be trimmed from -10% to +10% in the gas is artificially derated, the appropriate orifice size 2% increments.
- Page 18 SYSTEM OPERATION NOTE: Both readings may be taken simultaneously and read directly on the manometer if so WARNING desired. If an air conditioner coil or Electronic Air Cleaner is used in conjunction with the To avoid possible unsatisfactory operation furnace, the readings must also include theses of equipment damage due to underfiring or components, as shown in the following drawing.
- Page 19 SYSTEM OPERATION When the furnace is installed without a cooling coil, it is Gas Supply Pressure Measurement recommended that a removable access panel be provided in the outlet air duct. This opening shall be accessible when the furnace is installed and shall be of such a size that the heat exchanger can be viewed for visual light inspection or such that a sampling probe can be inserted into the airstream.
- Page 20 SYSTEM OPERATION NOTE: If using the inlet pressure tap on the Method 1 (Temporary Test): White-Rodgers 36J54 gas valve, then use the 36G/J 1. Using the on board push button switches, enter the Valve Pressure Check Kit, Part No. 0151K00000S. Gas Pressure Test menu (7 segment display “gPt”) and select YES to enable the Gas Pressure Test.
- Page 21 SYSTEM OPERATION temperature to determine the air temperature rise. Allow Using A Leak Detection adequate time for thermometer readings to stabilize. 4. Adjust temperature rise by adjusting the circulator blower speed. Increase blower speed to reduce temperature rise. Decrease blower speed to increase temperature rise.
- Page 22 SYSTEM OPERATION • Integrated control module performs safety circuit • Circulator blower and electronic air cleaner terminal checks. are de-energized. • Induced draft blower is energized on high speed for a • Circulator blower shuts off after the heat off delay period 15-second prepurge.
- Page 23 SYSTEM OPERATION DIAGNOSTIC CHART the induced draft blower and the coil front cover. These switches guard against insufficient airflow (combustion air and flue products) through the heat exchanger and/or WARNING blocked condensate drain conditions. High Voltage! Flame Sensor To avoid personal injury or death The flame sensor is a probe mounted to the burner/ due to electrical shock, disconnect manifold assembly which uses the principle of flame...
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Page 24: Scheduled Maintenance
SCHEDULED MAINTENANCE manufacturer. No further lubrication is required. Check Annual Inspection motor windings for accumulation of dust which may cause The furnace should be inspected by a qualified installer, or overheating. Clean as necessary. service agency at least once per year. This check should be performed at the beginning of the heating season. - Page 25 SCHEDULED MAINTENANCE CLOCKING A GAS METER 1. Turn off all gas appliances in the home. 2. Turn on the furnace. Ensure the furnace is operating at a 100% firing rate on 2 stage and modulating furnace product. 3. Once heating cycle is at a steady state (typically 15 minutes of operation), use a stopwatch to time how long it takes the smallest unit of measure dial on the gas meter to make a full revolution.
- Page 26 SCHEDULED MAINTENANCE 5. Use this formula to verify the Cubic Feet per Hour (CFH) input determined in step 4 is correct: (3600 x Gas Meter Dial Size) / Time (seconds) = Cubic Feet per Hour (CFH) 3600 is used as there are 60 seconds in a minute and 60 minutes in an hour.
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Page 27: Servicing
SERVICING Some of the electronic boards being used today, with flame INCOMING POWER rectification, will not function properly and/or at all without polarization of incoming power. Some also require phasing 120.00 0.00 between the primary and secondary sides of step-down transformers. -
Page 28: Checking Voltage
SERVICING 8. After completing check and/or repair, replace Junction Combustion Quality Box cover and reinstall the service panel doors. 1. Manifold Gas Pressure must be set for the gas being used, Natural or L.P., high and low firing rates. If 9. -
Page 29: Heating Anticipator
SERVICING 9. If the furnace blower motor starts and the condensing 5. Check transformer primary voltage at incoming line unit runs, then the trouble is in the thermostat or wiring. voltage connections, fuse, splices, and blower door Repair or replace as necessary. interlock switch. - Page 30 SERVICING Checking ECM Motors 5. Connect the other alligator clip to a 24VAC source. ECMmotors connect directly to the AC Line Voltage. DO NOT insert contactors in series with the ECM Motor AC NOTE: The alligator clips are NOT polarized. Line.
- Page 31 SERVICING Electrical Checks - High Voltage Power Circuits inductor AC Line Hot Connection WARNING AC Line Neutral Connection High Voltage! Disconnect all power before servicing or installing this unit. Multiple power Lines 1 and 2 will be connected sources may be present. Failure to do for 120VAC Power Connector so may cause property damage, personal applications only...
- Page 32 SERVICING 3. Remove the blower assembly from the furnace. Motor Checks 4. Remove the (3) screws securing the control/end bell to the motor. Separate the control/end bell. Disconnect WARNING the 3-circuit harness from the control/end bell to remove the control/end bell from the motor. High Voltage! 5.
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Page 33: Checking Duct Static
SERVICING CHECKING DUCT STATIC 4. Consult proper tables for the quantity of air. If the total external static pressure exceeds the maximum WARNING listed on the furnace rating plate, check for closed dampers, registers, undersized and/or oversized poorly laid out duct work. Never allow the products of combustion, including carbon monoxide, to enter the return The temperature rise of the furnace must be within the... -
Page 34: Checking Primary Limit Control
SERVICING WARNING SUPPLY High Voltage! Disconnect all power before servicing or installing this unit. Multiple power sources may be present. Failure to do so may cause property damage, personal injury or death. 1. Remove burner compartment door to gain access to the primary limit. -
Page 35: Checking Flame Rollout Control
SERVICING 2. Using an ohmmeter, test for continuity across the two terminals (only test when the auxiliary limit is at room temperature). BLOWER HOUSING RESET BUTTON AUXILIARY LIMIT CONTROL COLOR IDENTIFYING Testing Auxiliary Limit Control WARNING AUXILIARY LIMIT CONTROL To avoid possible fire, only reset the auxiliary limit control once. -
Page 36: Induced Draft Blower Motor
SERVICING 5. If the switch will not close after manually resetting, it must be replaced. If a roll out switch has tripped, it is important to find out Low (Main) why. Possible causes could be flame impingement, orifice plate out of position, burners with excessive cross-over Common slot dimension, over-firing, improper orifices, improper High... -
Page 37: Checking Orifices
SERVICING CHECKING GAS PRESSURE CHECKING ORIFICES Gas Supply Pressure Measurement A/GMVC, A/GCVC model furnaces have factory installed #45 natural gas orifices. CAUTION The only time resizing is required is when a reduction in To prevent unreliable operation or equipment firing rate is required for an increase in altitude or a furnace damage, the inlet gas supply pressure must is being converted for use with L.P. -
Page 38: Checking Hot Surface Ignitor
Low Stage 5.7 to 6.3” w.c. 6.0” w.c. CHECKING HOT SURFACE IGNITOR 120V Silicon Nitride Igniter - Amana® Brand and Goodman® Brand furnaces use a 120V silicon nitride igniter for ignition. The normal operating temperature is High Fire Regulator approximately 2156°F - 2678°F. -
Page 39: Checking For Flashback
SERVICING point specified for the particular switch. Either the switch is defective or the inducer/venting system is inadequate. WARNING Line voltage now present INDUCED DRAFT BLOWER PRESSURE SWITCH 6. Place unit in heating cycle, measure current draw of PRESSURE SWITCH HOSE ignitor during preheat cycle. -
Page 40: Checking Integrated Ignition Control Boards
Complete unit must be replaced. period. a. BEFORE replacing the ECM motor assembly or WARNING the end bell, first check the motor with a Goodman #UTT-01 UltraCheck-EZTM diaganostic tool . If the motor runs with the diagnostic tool, the motor Line voltage now present is good. -
Page 41: Memory Chips
SERVICING MEMORY CHIPS (COMFORTBRIDGE™ FURNACE ONLY) On a ComfortBridge™ furnace using the shared data memory chip is a “last resort.” The CoolCloudHVAC™ App should be used to populate shared data to the control via the “Shared Data” menu under Furnace tab. CHECKING FLAME SENSOR A flame sensing device is used in conjunction with the ignition control module to prove combustion. -
Page 42: Troubleshooting Chart
TROUBLESHOOTING Seven Segment Displays – Comm AC/HP Main Menu Mode Segment 1 Segment 2 Segment 3 Idle Constant Fan Compressor Cooling, Low Stage Compressor Cooling, High Stage Compressor Heat, Low Stage ... - Page 43 TROUBLESHOOTING Alarm Code Definition Table Alarm Code Definition Table Status Seven Segment Display Status Seven Segment Display Internal Control Fault Data Not Yet on Network Lockout Due to Excessive Retries or Recycles Invalid Data on Network Low Stage Pressure Switch Stuck Closed At Invalid External Shared Data ...
- Page 44 TROUBLESHOOTING ClimateTalk Comm 2-Stage AC/HP Name 7-Segment Display Cloud / Phone App Idle Idle Constant Fan Constant Fan Compressor Cooling, Low Stage Compressor Cooling, Low Stage Compressor Cooling, High Stage Compressor Cooling, High Stage Compressor Heat, Low Stage Compressor Heat, Low Stage ...
- Page 45 TROUBLESHOOTING Furnace Name/Cloud/Phone App 7 Segment Display User Modifiable Options Comments Last 6 Faults Views the control last 6 history faults. L Learn Menu Yes or No. Resets communication network. L Code Release No Views the control firmware revision number and Shared Data number. ...
- Page 46 TROUBLESHOOTING ClimateTalk Comm Outdoor 2-Stage AC/HP Name/Cloud/Phone App 7 Segment Display User Modifiable Options Comments Cool Trim Factor -10%, -8%,-6%, -4%, -2%, 0%, 2%, 4%, 6%, 8%,10% Trims the cooling airflow by the selected amount. Cool Airflow Profile A, B, C, D Select cooling airflow profiles.
- Page 47 TROUBLESHOOTING Diagnostic / Sym ptom s of Abnorm al Status LED Fault Description Possible Causes Corrective Actions Notes & Cautions Operation Codes • Furnace fails to operate None • No 115 pow er to • Manual disconnect sw itch • Check 115 pow er to furnace and •...
- Page 48 TROUBLESHOOTING Diagnos tic / Sym ptom s of Abnorm al Status LED Fault Description Possible Cause s Corrective Actions Notes & Cautions Ope ration Codes • Induced draft blow er and • Flame sensed w ith • Short to ground in fame •...
- Page 49 TROUBLESHOOTING Diagnostic / Sym ptom s of Abnorm al Status LED Fault Des cription Pos sible Causes Corrective Actions Notes & Cautions Ope ration Codes • Furnace fails to operate. • Gas valve is • Misw ired gas valve circuit •...
- Page 50 TROUBLESHOOTING Diagnostic / Sym ptom s of Abnorm al Status LED Fault Description Possible Caus es Corrective Actions Note s & Cautions Operation Code s • Furnace fails to operate. • Integrated control • Loose w iring connection • Tighten or correct w iring •...
- Page 51 TROUBLESHOOTING Diagnostic / Sym ptom s of Abnorm al Status LED Fault Description Possible Causes Corrective Actions Notes & Cautions Operation Code s • Furnace fails to operate. • Circulator blow er • Abnormal motor loading, • Check filters, filter grills/registers, •...
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Page 52: Wiring Diagrams
WIRING DIAGRAMS ID BLOWER TWO-STAGE PRESSURE SWITCH ASSEMBLY SURFACE HIGH FIRE IGNITER PRESSURE LOW FIRE SWITCH PRESSURE SWITCH FLAME SENSOR TWO STAGE GAS VALVE FRONT COVER (WHITE-RODGERS) PRESSURE SWITCH MANUAL RESET ROLLOUT LIMIT CONTROLS (SINGLE CONTROL ON 40 kBTU) AUTO RESET PRIMARY LIMIT CONTROL INDUCED DRAFT... - Page 53 GOODMAN BRAND ® AMANA BRAND ® is a registered trademark of Maytag Corporation or its related companies and is used under license. ® All rights reserved. Copyright © 2019-2020 Goodman Manufacturing Company, L.P.